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• ffmpeg concat loses audio after first clip only in browser, audio plays good on player like vlc etc

  1er octobre 2019, par Rajan Tpss

  i am trying to combine or concatenate audio file one after other like after concatenation of two audio files, both file will downloaded as a single file wheres audio will be played in a queue one after other.

  after some research i found the package FFmpeg i.e dealt with mp3,mp4 etc files.i tried to run FFmpeg commands in terminal but file is created and playing good on VLC but not playing accurately in browser.

  Some Commands tried by me in terminal are as follow :-

  ffmpeg -i "concat:a.mp3|b.mp3" -acodec copy output.mp3

  ffmpeg -f concat -i files.txt -c copy output.mp3

  ffmpeg -i a.mp3 -i b.mp3 -filter_complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=0:a=1 [v] [a]" -map "[v]" -map "[a]" output.mp3

  ffmpeg -y -i "concat:a.mp3|b.mp3" -ar 22050 -ab 512 -b 800k -f mp4 -s 514*362 -strict -2 -c:a aac "OUTPUT.mp4"

  Library Link followed by me :- https://ffmpeg.org/ffmpeg-filters.html

  Note :- I am using Ubuntu based system

  file is created successfully from above commands and playing well on VLC player.

  where in browser first clip is playing well but after first clip browser stops. somehow second audio clip is not playing in browser. i don’t know why may be there is same kind of pattern error.

  if anyone can help, i shall be very thankful to him/her.

  Thanks

• on PKG_CONFIG_PATH setting

  25 novembre 2016, par Kindermann

  I’ve installed ffmpeg on Ubuntu 16.04. Each time when I wanted to use pkg_config_path in a new terminal, I always had to type the following :

  export PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig"

  Is there a way where I can permanently set this path ?

• pydub no ffprobe found

  21 septembre 2019, par Virgil Sisoe

  I have an app for MacOS that is compiled with py2app. The app uses the pydub module and the latter uses ffmpeg family package.

  The problem is that once I compile the app and move it to a different OS, the subprocess call from pydub fails to find any of the ffmpeg packages even though they are installed in /usr/local/bin.

  If I launch the app from terminal ./Nameapp.app/Contents/MacOs/Nameapp then it runs no problem, but if I launch it with double click then pydub complains not finding the packages and the app hangs where ffmpeg/ffprobe should do the work.

  I can see that pydub searches in the /usr/local/bin only if launched from terminal, otherwise no. If I add /usr/local/bin to PATH, pydub doesnt complain anymore that it doesnt find ffmpeg/ffprobe, but it still gives me an error for both ffmpeg and ffprobe : [Errno 2] No such file or directory:.

  If I hardcode the path pydub.AudioSegment.converter = "/usr/local/bin/ffmpeg", the app gives me only ffprobe error [Errno 2] No such file or directory:'ffprobe': 'ffprobe'.

  On some other posts i’ve seen pydub.AudioSegment.ffprobe = "/path/to/ffprobe" but it doesnt seem to work in my case ?

  So my two questions are :

  How to hardcode the ffprobe path in pydub ?
  How to solve this without hardcoding path ?